Can these be used to make keychains with epoxy resin?

The NFC sensors on MOST phones/devices do work through the thickness of resin-like materials, like phone cases, just be careful not to make the resin too thick on either side. Otherwise, the epoxy or resin should not pose an issue to the internal chip/wiring.

How do you program these? What do you use to write to them and able to rewrite?

Download NFC Tools or Macrodroid app

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30pcs NFC Tags Black NFC Tag NTAG215 NFC Cards Blank NFC Chips Programmable NFC 215 Tag Rewritable NFC Card, 504 Bytes, Compatible with TagMo and NFC Enabled Phones and Devices

30pcs NFC Tags Black NFC Tag NTAG215 NFC Cards Blank NFC Chips Programmable NFC 215 Tag Rewritable NFC Card, 504 Bytes, Compatible with TagMo and NFC Enabled Phones and Devices

Product ID: 389814704

💧Waterproof & durable PVC

💾504 bytes NTAG215 memory

📏25mm coin-sized compactness

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📲 Tap into the future: NFC tags that keep you connected and ahead of the curve!

ROBUST RELIABLE - Crafted from durable, waterproof PVC to withstand daily hustle and spills.
POCKET SIZED POWER - Ultra-compact 25mm diameter fits anywhere, perfect for on-the-go pros.
ENDLESS CUSTOMIZATION - Program up to 100,000 reads/writes with fast, rewritable NTAG215 chip memory.
INSTANT SHARING MAGIC - Tap to share contacts, WiFi, links, or even game data—ignite your digital networking.
NEXT LEVEL COMPATIBILITY - Seamlessly works with Android, iOS, TagMo, and all NFC-enabled devices.

This 30-pack of black NTAG215 NFC tags offers 504 bytes of rewritable memory in a durable, waterproof PVC shell. Sized at a convenient 25mm diameter, these programmable NFC cards are compatible with Android, iOS, and TagMo-enabled devices, supporting up to 100,000 read/write cycles. Ideal for seamless data sharing, custom gaming, and smart connectivity, they combine longevity with versatility for professionals who demand reliable tech on the move.

Specifications

ASIN	B09L7MJTGL
Best Sellers Rank	#31,535 in Office Products ( See Top 100 in Office Products ) #232 in Blank Labeling Tags
Brand	K LAKEY
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (513)
Date First Available	November 8, 2021
Item Weight	0.704 ounces
Item model number	SP-COIN-B-S-30
Manufacturer	SANPOPO
Manufacturer Part Number	SP-COIN-B-S-30
Material Type	Polyvinyl Chloride
Product Dimensions	4.72 x 2.36 x 0.39 inches
Shape	Round
Size	30pcs Coin Cards

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